第四代b'及t'夸克衰變

Bo-Yan Huang; 黃博彥

請用此 Handle URI 來引用此文件： http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/40896

完整後設資料紀錄

DC 欄位	值	語言
dc.contributor.advisor	侯維恕(Wei-Shu Hou)
dc.contributor.author	Bo-Yan Huang	en
dc.contributor.author	黃博彥	zh_TW
dc.date.accessioned	2021-06-14T17:05:37Z	-
dc.date.available	2008-07-30
dc.date.copyright	2008-07-30
dc.date.issued	2008
dc.date.submitted	2008-07-27
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dc.identifier.uri	http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/40896	-
dc.description.abstract	Tevatron 目前正在研究t'→ bW 衰變，但由於 LHC 的到來，我們必須考慮更多的能量範圍。我們討論了當b'的質量小於tW門檻時的 b'→tW(∗) 及 t(∗)W b'衰變，並討論它們在b'的質量大於tW門檻時它們是如何變成 b'→tW。我們使用了convolution 方法來做五體衰變的計算。除了CDF探討的t→bW 我們亦討論了t'→b'(∗)W(∗)。	zh_TW
dc.description.abstract	At the Tevatron, heavy t'→ bW decay is currently being searched for, but a broader spectrum should be explored at the LHC. We discuss the two branches of b'→tW(∗) and t(∗)W for b' below the tW threshold, and how it merges with b'→tW above threshold. We treat with convolution method and five body final state. A similar discussion is given for b'→t'(∗)W(∗) decay, and t'→b'(∗)W(∗) decay, besides the t'→bW considered by CDF.	en
dc.description.provenance	Made available in DSpace on 2021-06-14T17:05:37Z (GMT). No. of bitstreams: 1 ntu-97-R95222023-1.pdf: 1544366 bytes, checksum: 0ea8692e4da27bdcd543a61297836749 (MD5) Previous issue date: 2008	en
dc.description.tableofcontents	Acknowledgement vii Abstract 1 1 Introduction 1 1.1 The Development of Particle Physics. . . . . . . . . 1 1.2 4th Generation Standard Model. . . . . . . . . . . . 6 2 Very Heavy Quark Decays. . . . . . . . . . . . . . . . 9 2.1 Semileptonic Decay Rates . . . . . . . . . . . . . .10 2.2 Top Quark Decays . . . . . . . . . . . . . . . . . .12 2.3 Convolution Method. . . . . . . . . . . . . . . . . 16 2.4 b' to tW. . . . . . . . . . . . . . . . . . . . . . 18 2.4.1 b'→tfifj and b→bW+W-. . . . . . . . . . . . . . 19 2.4.2 Double Counting Contradiction . . . . . . . . . . 21 2.4.3 b'5-Body Decay . . . . . . . . . . . . . . . . . 22 3 4th Generation Quarks Decays . . . . . . . . . . . . 29 3.1 Cascade Decays . . . . . . . . . . . . . . . . . . 29 3.2 Dominant b'and t'Decays . . . . . . . . . . . . . . 30 3.3 Some Assumptions . . . . . . . . . . . . . . . . . 38 3.4 b'and t'widths . . . . . . . . . . . . . . . . . . 39 4 Conclusion . . . . . . . . . . . . . . . . . . . . . 43 A Units and Dimensions. . . . . . . . . . . . . . . . . 45 B Conventions and Feynman Rules . . . . . . . . . . . . 47 B.1 Four-Vectors and Scalar Product . . . . . . . . . . 47 B.2 Dirac Gamma Matrix . . . . . . . . . . .. . . . . . 47 B.3 Trace Algebras and Tensor Contractions . . . . . . 48 B.4 Feynman Rules at Tree Level . . . . . . . . . . . . 49 B.5 Cross Sections and Decays . . . . . . . . . . . . . 50 C Phase Space Integration . . . . . . . . . . . . . . . 51 C.1 Two-Body Phase Space . . . . . . .. . . . . . . . . 51 C.2 Multiparticle Phase Space . . . . . . . . . . . . . 52 C.3 2-Body Quark Decay . . . . . . . . . . . . . . . . 53 D CKM matrix . . . . . . . . . . . . . . . . . . . . . 55
dc.language.iso	en
dc.subject	寬度效應	zh_TW
dc.subject	第四代夸克	zh_TW
dc.subject	衰變	zh_TW
dc.subject	width effect	en
dc.subject	Fourth generation	en
dc.subject	decay	en
dc.title	第四代b'及t'夸克衰變	zh_TW
dc.title	Fourth Generation b' and t' Quarks Decay	en
dc.type	Thesis
dc.date.schoolyear	96-2
dc.description.degree	碩士
dc.contributor.oralexamcommittee	張元翰(Yuan-Hann Chang),張寶棣(Paoti Chang)
dc.subject.keyword	第四代夸克,衰變,寬度效應,	zh_TW
dc.subject.keyword	Fourth generation,decay,width effect,	en
dc.relation.page	57
dc.rights.note	有償授權
dc.date.accepted	2008-07-29
dc.contributor.author-college	理學院	zh_TW
dc.contributor.author-dept	物理研究所	zh_TW
顯示於系所單位：	物理學系

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